diff --git a/Text/Pandoc/Builder.hs b/Text/Pandoc/Builder.hs
--- a/Text/Pandoc/Builder.hs
+++ b/Text/Pandoc/Builder.hs
@@ -1,6 +1,6 @@
 {-# LANGUAGE TypeSynonymInstances, FlexibleInstances, MultiParamTypeClasses,
     DeriveDataTypeable, GeneralizedNewtypeDeriving, CPP, StandaloneDeriving,
-    DeriveGeneric #-}
+    DeriveGeneric, DeriveTraversable #-}
 {-
 Copyright (C) 2010-2012 John MacFarlane <jgm@berkeley.edu>
 
diff --git a/pandoc-types.cabal b/pandoc-types.cabal
--- a/pandoc-types.cabal
+++ b/pandoc-types.cabal
@@ -1,5 +1,5 @@
 Name:                pandoc-types
-Version:             1.12.3.1
+Version:             1.12.3.2
 Synopsis:            Types for representing a structured document
 Description:         @Text.Pandoc.Definition@ defines the 'Pandoc' data
                      structure, which is used by pandoc to represent